We are sorry to hear you encountered a bad advertisement on Wikia. If you could provide further details below we will share them with our advertising manager, who will review the ad and may be able to remove it from the system.
Be sure to tell us what wiki you're on, what ad you saw, and why it was a problem. It would also help if you could include a screenshot and the URL of the ad. Instructions for finding the URL of an ad are listed here: http://help.wikia.com/wiki/Help:Bad_advertisements
Thank you and happy editing!